10000mm hh would be good for both head and floor. dont buy something for the price is somethings to dear save for it and wait. it will make a huge difference when you actually come to use it.
http://www.outdoorkit.co.uk/images/p...9_enlarged.jpg if that link works that tent is bullet proof.
http://www.outdoorkit.co.uk/product.php?product_id=3480 try this one too, i have seen them cheaper if you shop around too.